Abstract
In this paper a weighting function for voltage
unbalance correction is proposed to be integrated into the
control of distributed grid-interfacing systems. The correction
action can help decrease the negative-sequence voltage at the
point of connection with the grid. Based on the voltage
unbalance factor and system power capacity, the interfacing
converter delivers a small amount of negative-sequence current
to the grid and helps correcting the negative-sequence voltage.
Although the reduced amplitudes contributed by each individual
DG system are very small compared to the total negativesequence
component, many DG system modules can
collectively achieve substantial results in the grid. As a practical
example, a three-phase grid-interfacing converter servicing
sensitive loads with distributed sources is employed to integrate
this additional function. Design principles, simulation and
experimental results are presented to verify the proposal.
Original language | English |
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Title of host publication | International Conference on Renewable Energy and Power Quality (ICREPQ), proceedings,Santander, Spain |
Publisher | ICREPQ |
Pages | 1-6 |
Publication status | Published - 2008 |